CVE-2023-25566

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, a memory leak can be triggered when parsing usernames which can trigger a denial-of-service. The domain portion of a username may be overridden causing an allocated memory area the size of the domain name to be leaked. An attacker can leak memory via the main gss_accept_sec_context entry point, potentially causing a denial-of-service. This issue is fixed in version 1.2.0.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

Affected Software

Name	Vendor	Start Version	End Version
Gss-ntlmssp	Gss-ntlmssp_project	*	1.2.0 (excluding)
Red Hat Enterprise Linux 8	RedHat	gssntlmssp-0:1.2.0-1.el8_8	*
Gss-ntlmssp	Ubuntu	bionic	*
Gss-ntlmssp	Ubuntu	kinetic	*
Gss-ntlmssp	Ubuntu	lunar	*
Gss-ntlmssp	Ubuntu	mantic	*
Gss-ntlmssp	Ubuntu	trusty	*
Gss-ntlmssp	Ubuntu	xenial	*

Potential Mitigations

Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
For example, glibc in Linux provides protection against free of invalid pointers.
When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2023-25566
CWE	https://cwe.mitre.org/data/definitions/401.html

Missing Release of Memory after Effective Lifetime

Weakness

Affected Software

Potential Mitigations

References